nucleus
Most cells you see will be red blood cells (erythrocytes) and they lack a nucleus in their structure.
Red blood cells lack a nucleus.
The basic structure of red blood cells is that they have a bi-concave shape to increase surface area, and lack a nucleus so that more haemoglobin can be packed in.
Red Blood Cells
Red blood cells are the only cells in the body that lack a nucleus.
If red blood cells lack Rh antigens, the blood is called Rh-negative.
A nucleus
It is actually the other way around - mature red blood cells lack a nucleus.
Red blood cells, also known as erythrocytes, lack a nucleus.
This is a biology question, but the answer is Prokaryotic. ------------------------------------------------------------------------------------ Red blood cells also lack a nucleus.
Red blood cells (erythrocytes) cannot be used for karyotyping as they do not contain a nucleus. Karyotyping involves examining the number and structure of chromosomes within the nucleus of a cell, which red blood cells lack.
Animal cells lack chloroplasts and as such cannot photosynthesise.